• Neurosurgery · Mar 2023

    Association Between Frontal Lobe Hemodynamics and Neurocognitive Dysfunction in Adults With Moyamoya Disease: Retrospective Cohort Analysis.

    • Sho Tsunoda, Tomohiro Inoue, Kazuhiro Ohwaki, Naoko Takeuchi, Takako Shinkai, Akira Fukuda, Masafumi Segawa, Mariko Kawashima, Atsuya Akabane, Satoru Miyawaki, and Nobuhito Saito.
    • Department of Neurosurgery, NTT Medical Center Tokyo, Shinagawa-ku, Tokyo, Japan.
    • Neurosurgery. 2023 Mar 1; 92 (3): 547556547-556.

    BackgroundAdult patients with moyamoya disease (MMD) may present with mild cognitive dysfunction, even those without evidence of conspicuous brain parenchymal damage. This cognitive dysfunction might be caused by local frontal lobe ischemia.ObjectiveTo explore the relationship between frontal lobe hemodynamic insufficiency and cognitive dysfunction in patients with MMD.MethodsThirty adult patients with MMD without conspicuous brain parenchymal damage were retrospectively examined. Patients with MMD with frontal lobe intracerebral steal phenomenon on single photon emission computed tomography were defined as group S (n = 13) and those without it were defined as group P (n = 17). A comparative group comprising patients with unruptured intracranial aneurysm was defined as group C (n = 30). The results of various cognitive and intelligence tests and a composite cognitive score were compared between groups.ResultsThe digit span test forward version ( P = .041), frontal assessment battery ( P = .022), and composite cognitive score ( P = .015) z-scores were significantly lower in group S than group C. Adjusting for sex and age, patients in group S had a significantly lower composite cognitive score compared with those in group C in multiple regression analysis ( P = .037). Executive dysfunction and working memory dysfunction may be involved in the cognitive decline observed in group S.ConclusionMild cognitive dysfunction in MMD was associated with frontal lobe hemodynamic insufficiency. Future studies should examine whether revascularization can improve cerebral hypoperfusion and neurocognitive function in these patients.Copyright © Congress of Neurological Surgeons 2022. All rights reserved.

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